Process for dyeing furs, skins, hairs, feathers, or the like



srArEs 'FFICE.

PAUL ONNEBTZ, OF BERLIN-WILMERSDOBF, GERMANY, ASSIGNOR TO ACTIENGESELLSCHAFT FUR ANILIN FABRIKATION, OF BERLIN, GERMANY.

PROCESS FOR DYEING FURS, SKINS, HAIRS, FEATEERS, R THE LIKE.

Ho Drawing.

To all whom it may concern.

Be it known that 1, PAUL ONNERTZ, a citizen of the German Republic,residing at BerlinlVilmersdorf, Germany (my postoflice address beingDusseldorferstr. 72,

Berlin-\Vilmersdorf, Germany), have invented certain new and usefulImprovements in Processes for Dyeing Furs skins, Hairs, Feathers, or thelike, of which the following is a specification. l 1

It is known to dye furs, feathers, hairs or the like with aid of4-amino-1-oxybenzene. By my present invention tints which difierconsiderably from those obtained with 4- amino-l-oxybenzene may be 0tained by application of derivatives of 4-amino-1-oxybenzene containingnegative substituents such ashalogen nitro-group in presence of anoxidin agent, the shades being of an excellent astness. v

The said derivatives are superior to 4- amino-l-oxybenzene because theymay be [used mixed with other com ounds'for example with meta-diamine, wereby dyeings are obtained showing the mixed shades of thecomponents,'whereas the unsubstituted 4-aminoJ-oxybenzene reacts withmany other compounds so that the shades thus obtained differ from thoseof the compo- 0 nents.

llhe following example illustrates my in I vent-ion, without limiting itThe well-washed skin is handled for-some I hours at ordinary temperaturein a bath which contains per litre 2 grams of 2-chloro- Applicationfiled m is, 1922. semi m. 561,011.

amino-l-oxybenzene, a grams of ammonia (of 25% strength) and 30 cc. ofhydrogen peroxide (of about 3% strength). The skin is then well-washedand finished as usual, a brownish shade being obtained.

The tints obtained on skins prepared with chromium or copper mordantsare brown, those on skins prepared with iron mordants are reddish brown.

2.3 dichlor 4 amino-l-oxybenzene' dyes gra ammo-l-oxybenzene, when dyedon furs prepared with chromiumor copper-mordants, dyes 'brown shadeswith a reddish tinge.

Having now particularly described my said invention and the manner inwhich it may be performed what I claim is- 1. Process of dyeing furs,skins, hairs, feathers and the like, comprising treating the same in thepresence of an oxidizing agent with a solution of a 4-amino-1-oxybenzenecontaining a negative substituent.

2. Process of dyeing furs, skins, hairs, feathers and the like,comprising treating the same in the presence of an oxidizing agent witha solution of 2-nitro-4-amin0- l-oxybenzene.

In testimony whereof I afiix my signature in presence of two witnesses.

DR. PAUL ONNERTZ.

Witnesses:

LE0 Kmmovrus, Dr. MAX BRAUNS.

tints inclining to green; 2-nitro-4-

